[Article] Testable signatures on VMS structure

[oshfdk]

I dont think so.  To give you an idea, Naibbe monograms and bigrams are drawn from tables at random, for example: it is a core feature of a slot grammar. But this is enough to break the expected signatures.

Ok, thanks! So, no combination of Naibbe mappings and a meaningful plaintext can realistically produce ciphertext that would conform to the four criteria?